class Settings():
    """存储《外星人入侵》所有的设置的类"""

    def __init__(self):
        """初始化游戏的设置"""
        #屏幕设置
        self.screen_width = 1200
        self.screen_height = 800
        self.bg_color = (230,230,230)

        #飞船设置
        self.ship_speed_factor = 1.5
        self.ship_limit = 3

        #子弹设置
        self.bullet_speed_factor = 1
        self.bullets_allowed = 3

        #外星人设置
        self.alien_speed_factor = 1
        self.fleet_dorp_speed = 10
        #fleet_direction为1表示向右移动，为-1表示向左移动
        self.fleet_direction = 1

        #以什么样的素的加快游戏节奏
        self.speedup_scaie = 1.1

        self.initialize_dynamic_settings()
    
    def initialize_dynamic_settings(self):
        """初始化随游戏进行而变化的设置"""
        self.ship_speed_factor = 1.5
        self.bullet_speed_factor = 1
        self.alien_speed_factor = 1
        self.alien_points = 50
        #fleet_direction为1表示向右移动，为-1表示向左移动
        self.fleet_direction = 1

    def increase_speed(self):
        """提高速度和分数设置"""
        self.ship_speed_factor *= self.speedup_scaie
        self.bullet_speed_factor *= self.speedup_scaie
        self.alien_speed_factor *= self.speedup_scaie

        self.alien_points = int(self.alien_points * self.speedup_scaie)



        